Fix for interface bitness check

Author: matthew-brett

tools/build_openblas.sh

@@ -23,7 +23,7 @@
 # Convert to Unix-style path
 openblas_root="$(cygpath ${1:-${OPENBLAS_ROOT:-c:\\opt}})"
 build_bits="${2:-${BUILD_BITS:-64}}"
-if [ "$INTERFACE64" == "1" ]; then if_default=64 else if_default=32; fi
+if [ "$INTERFACE64" == "1" ]; then if_default=64; else if_default=32; fi
 if_bits=${3:-${if_default}}
 # Our directory for later copying
 if [ -z "$START_DIR" ]; then