[NFC] Improve CMakeLists.txt file readibility

Add some extra lines and indentations.

CMakeLists.txt

@@ -3,7 +3,9 @@
 ##
 
 cmake_minimum_required(VERSION 2.8.5)
+
 project(OpenBLAS C ASM)
+
 set(OpenBLAS_MAJOR_VERSION 0)
 set(OpenBLAS_MINOR_VERSION 3)
 set(OpenBLAS_PATCH_VERSION 18.dev)
@@ -22,17 +24,25 @@ endif()
 if(MSVC)
   option(BUILD_WITHOUT_LAPACK "Do not build LAPACK and LAPACKE (Only BLAS or CBLAS)" ON)
 endif()
+
 option(BUILD_WITHOUT_CBLAS "Do not build the C interface (CBLAS) to the BLAS functions" OFF)
+
 option(DYNAMIC_ARCH "Include support for multiple CPU targets, with automatic selection at runtime (x86/x86_64, aarch64 or ppc only)" OFF)
+
 option(DYNAMIC_OLDER "Include specific support for older x86 cpu models (Penryn,Dunnington,Atom,Nano,Opteron) with DYNAMIC_ARCH" OFF)
+
 option(BUILD_RELAPACK "Build with ReLAPACK (recursive implementation of several LAPACK functions on top of standard LAPACK)" OFF)
+
 option(USE_LOCKING "Use locks even in single-threaded builds to make them callable from multiple threads" OFF)
+
 if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
   option(NO_AFFINITY "Disable support for CPU affinity masks to avoid binding processes from e.g. R or numpy/scipy to a single core" ON)
 else()
   set(NO_AFFINITY 1)
 endif()
+
 option(CPP_THREAD_SAFETY_TEST "Run a massively parallel DGEMM test to confirm thread safety of the library (requires OpenMP and about 1.3GB of RAM)" OFF)
+
 option(CPP_THREAD_SAFETY_GEMV "Run a massively parallel DGEMV test to confirm thread safety of the library (requires OpenMP)" OFF)
 option(BUILD_STATIC_LIBS "Build static library" OFF)
 if(NOT BUILD_STATIC_LIBS AND NOT BUILD_SHARED_LIBS)
@@ -46,9 +56,10 @@ endif()
 # Add a prefix or suffix to all exported symbol names in the shared library.
 # Avoids conflicts with other BLAS libraries, especially when using
 # 64 bit integer interfaces in OpenBLAS.
-
 set(SYMBOLPREFIX "" CACHE STRING  "Add a prefix to all exported symbol names in the shared library to avoid conflicts with other BLAS libraries" )
+
 set(SYMBOLSUFFIX "" CACHE STRING  "Add a suffix to all exported symbol names in the shared library, e.g. _64 for INTERFACE64 builds" )
+
 #######
 if(BUILD_WITHOUT_LAPACK)
   set(NO_LAPACK 1)
@@ -154,6 +165,7 @@ if(MSVC)
   set( CMAKE_LIBRARY_OUTPUT_DIRECTORY_DEBUG ${PROJECT_BINARY_DIR}/lib/Debug)
   set( CMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE ${PROJECT_BINARY_DIR}/lib/Release)
 endif ()
+
 # get obj vars into format that add_library likes: $<TARGET_OBJS:objlib> (see http://www.cmake.org/cmake/help/v3.0/command/add_library.html)
 set(TARGET_OBJS "")
 foreach (SUBDIR ${SUBDIRS})
@@ -362,6 +374,7 @@ endif()
   if (NOT ${SYMBOLSUFFIX} STREQUAL "")
     message(STATUS "adding suffix ${SYMBOLSUFFIX} to names of exported symbols in ${OpenBLAS_LIBNAME}")
   endif()
+
   add_custom_command(TARGET ${OpenBLAS_LIBNAME}_shared POST_BUILD
     COMMAND perl  ${PROJECT_SOURCE_DIR}/exports/gensymbol "objcopy" "${ARCH}" "${BU}" "${EXPRECISION_IN}" "${NO_CBLAS_IN}" "${NO_LAPACK_IN}" "${NO_LAPACKE_IN}" "${NEED2UNDERSCORES_IN}" "${ONLY_CBLAS_IN}" \"${SYMBOLPREFIX}\" \"${SYMBOLSUFFIX}\" "${BUILD_LAPACK_DEPRECATED}" > ${PROJECT_BINARY_DIR}/objcopy.def
     COMMAND objcopy -v --redefine-syms ${PROJECT_BINARY_DIR}/objcopy.def  ${PROJECT_BINARY_DIR}/lib/lib${OpenBLAS_LIBNAME}.so
@@ -472,4 +485,3 @@ install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PN}ConfigVersion.cmake
 install(EXPORT "${PN}${SUFFIX64}Targets"
         NAMESPACE "${PN}${SUFFIX64}::"
         DESTINATION ${CMAKECONFIG_INSTALL_DIR})
-