efl: fix build by adding -fPIC to CFLAGS

on armv7/cortexa8 efl fails with:

| ld: error: modules/evas/image_loaders/png/bin_evas_evas_cserve2_slave-evas_image_load_png.o: requires unsupported dynamic reloc R_ARM_MOVW_ABS_NC; recompile with -fPIC
| ld: error: modules/evas/image_loaders/png/bin_evas_evas_cserve2_slave-evas_image_load_png.o: requires unsupported dynamic reloc R_ARM_MOVW_ABS_NC; recompile with -fPIC
Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-efl/recipes-efl/efl/efl_1.15.1.bb

@@ -23,3 +23,7 @@ PARALLEL_MAKE_class-native = ""
 #Makefile:2163: recipe for target 'all-recursive' failed
 # autotools-brokensep
 B = "${S}"
+
+#ld: error: modules/evas/image_loaders/png/bin_evas_evas_cserve2_slave-evas_image_load_png.o: requires unsupported dynamic reloc R_ARM_MOVW_ABS_NC; recompile with -fPIC
+#ld: error: modules/evas/image_loaders/png/bin_evas_evas_cserve2_slave-evas_image_load_png.o: requires unsupported dynamic reloc R_ARM_MOVW_ABS_NC; recompile with -fPIC
+CFLAGS += "-fPIC"