Fix mod_opal build

...by separating out CPPFLAGS and CXXFLAGS.

src/mod/endpoints/mod_opal/Makefile.am

@@ -6,6 +6,7 @@ PKG_DIR=/usr/local/lib/pkgconfig
 #DEBUG_SUFFIX:=--define-variable=suffix=_d
 mod_LTLIBRARIES = mod_opal.la
 mod_opal_la_SOURCES  = mod_opal.cpp
-mod_opal_la_CFLAGS   = $(AM_CFLAGS) $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH):$(PKG_DIR) pkg-config opal $(DEBUG_SUFFIX) --cflags)
+mod_opal_la_CPPFLAGS   = $(AM_CPPFLAGS) $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH):$(PKG_DIR) pkg-config opal $(DEBUG_SUFFIX) --cflags | sed 's/-[^ID][^ ]*//g')
+mod_opal_la_CXXFLAGS   = $(AM_CXXFLAGS) $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH):$(PKG_DIR) pkg-config opal $(DEBUG_SUFFIX) --cflags | sed 's/-[ID][^ ]*//g')
 mod_opal_la_LIBADD   = $(switch_builddir)/libfreeswitch.la
 mod_opal_la_LDFLAGS  = -avoid-version -module -no-undefined -shared $(shell pkg-config opal $(DEBUG_SUFFIX) --libs)