BBB: fix libgles-omap3 build

4.x version of libgles-omap4 did not build correctly any more, since correct
compiler flags were not used. Need to use the CC instead of PLAT_CC which is
modified by the makefiles.

Change-Id: I23f4f757db392a65a6322be857bd47c06047f38b
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>

meta-ti-extras/recipes/libgles/libgles-omap3_4.10.00.01.bb

 require recipes-graphics/libgles/libgles-omap3-no-x.inc
 
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:${COREBASE}/../meta-ti/recipes-graphics/libgles/${PN}"
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:${COREBASE}/../meta-ti/recipes-graphics/libgles/${PN}:"
 
 LICENSE = "TI-TSPA"
 
@@ -46,3 +46,10 @@ SRC_URI[sha256sum] := "${@base_contains('TUNE_FEATURES', 'callconvention-hard',
 S = "${WORKDIR}/Graphics_SDK_${SGXPV}"
 
 LIBGLESWINDOWSYSTEM = "libpvrPVR2D_FRONTWSEGL.so.1"
+
+do_configure_append() {
+	# PLAT_CC might not have needed arguments, so use CC instead.
+	for mak in $(find ${S} -name "*.mak" -o -name Makefile) ; do
+		sed -i -e s:\$\(PLAT_CC\):\$\(CC\):g $mak
+	done
+}