fix misplaced lines

.travis.yml

@@ -214,10 +214,10 @@ matrix:
       osx_image: xcode11.5
       before_script:
         - COMMON_FLAGS="DYNAMIC_ARCH=1 NUM_THREADS=32"
+        - brew update
+        - brew install gcc@10
       script:
         - travis_wait 45 make QUIET_MAKE=1 $COMMON_FLAGS $BTYPE
-        - brew update
-        - brew install gcc-10
       env:
         - BTYPE="TARGET=NEHALEM BINARY=64 INTERFACE64=1 FC=gfortran-10"