Started converting lib target to CMake.

The main part of this target is looping through the BLAS subfolders
and calling make on them. Need to add CMakeLists.txt for each of these
subfolders.

cmake/prebuild.cmake

@@ -19,7 +19,7 @@
 # F_COMPILER
 # FC
 # BU
-# CORE
+# CORE <- REQUIRED
 # LIBCORE
 # NUM_CORES <- REQUIRED
 # HAVE_MMX
@@ -105,4 +105,5 @@ message(STATUS "GETARCH LOG: ${GETARCH_LOG}")
 
 # temporarily hardcoded to get system.cmake working
 set(NUM_CORES 4)
+set(CORE "GENERIC")