Add AIX config file

Utilities/Release/config_AIX

@@ -0,0 +1,13 @@
+PLATFORM="aix15"
+CC="xlc"
+CXX="xlC"
+
+# Write entries into the cache file before building cmake.
+write_cache()
+{
+cat > CMakeCache.txt <<EOF
+BUILD_TESTING:BOOL=OFF
+CMAKE_EXE_LINKER_FLAGS:STRING=-bstatic
+CMAKE_SKIP_RPATH:BOOL=1
+EOF
+}