package/gcnano-binaries: set Version: field in .pc files

All .pc files have a Version field set to #VERSION#, which needs to be
replaced, otherwise packages checking the version of OpenGL ES, EGL,
GBM, etc. will fail. For example:

Dependency gbm found: NO unknown version, but need: ['>=17.1.0']

Such problems have been seen with both libepoxy and SDL2.

The version 21.1.1 is chosen because it matches what the Yocto recipe
is doing for this package:

  https://github.com/STMicroelectronics/meta-st-stm32mp/blob/kirkstone/recipes-graphics/gcnano-userland/gcnano-userland.inc#L42

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/gcnano-binaries/gcnano-binaries.mk

@@ -60,7 +60,7 @@ define GCNANO_BINARIES_INSTALL
 	ln -sf gbm/gbm.h $(1)/usr/include/gbm.h
 	cd $(@D)/$(GCNANO_BINARIES_USERLAND_SUBDIR)/pkgconfig/ ; \
 	for file in *.pc ; do \
-		sed -e "s|#PREFIX#|/usr|" $$file > $$file.temp ; \
+		sed -e "s|#PREFIX#|/usr|" -e "s|#VERSION#|21.1.1|" $$file > $$file.temp ; \
 		$(INSTALL) -D -m 0644 $$file.temp $(1)/usr/lib/pkgconfig/$$file ; \
 	done
 endef