[svn-r25654] Bug fix: HDFFV-8933

Description:
Mac has changed to use the clang/clang++ compilers but compiler settings for production, debug and profile
were not setup.

Solution:
Setup default values for PROD_CFLAGS, PROD_CPPFLAGS, DEBUG_CFLAGS, DEBUG_CPPFLAGS.
PROFILE_CFLAGS and PROFILE_CPPFLAGS were set too but clang does not -pg or such for
profiling. Need to fix it later.

Tested: duck, swallow, and quail using --enable-production.

config/apple

@@ -31,6 +31,20 @@ if test "X-" = "X-$CC"; then
 	*)
 	    CC=clang
 	    CC_BASENAME=clang
+
+	    # Production
+	    PROD_CFLAGS="-O3" 
+	    PROD_CPPFLAGS="-O3" 
+
+	    # Debug
+	    DEBUG_CFLAGS="-g -O0"
+	    DEBUG_CPPFLAGS="-g -O0"
+
+	    # Profile
+	    # Use this for profiling with gprof
+	    # Just "-g" for now. More later.
+	    PROFILE_CFLAGS="-g"
+	    PROFILE_CPPFLAGS="-g"
 	    ;;
     esac
 fi