Fix sed to replace by the correct var

Author: raoulh

Makefile.pc

@@ -4,13 +4,13 @@ include config.mk
 all:
 	echo "prefix=$(prefix)" > egl.pc
 	cat egl.pc.in >> egl.pc
-	sed -i "s/MVERSION/$MALI_VERSION/g" egl.pc
+	sed -i "s/MVERSION/${MALI_VERSION}/g" egl.pc
 	echo "prefix=$(prefix)" > gles_cm.pc
 	cat gles_cm.pc.in >> gles_cm.pc
-	sed -i "s/MVERSION/$MALI_VERSION/g" gles_cm.pc
+	sed -i "s/MVERSION/${MALI_VERSION}/g" gles_cm.pc
 	echo "prefix=$(prefix)" > glesv2.pc
 	cat glesv2.pc.in >> glesv2.pc
-	sed -i "s/MVERSION/$MALI_VERSION/g" glesv2.pc
+	sed -i "s/MVERSION/${MALI_VERSION}/g" glesv2.pc
 
 install: egl.pc gles_cm.pc glesv2.pc
 	$(MKDIR) $(libdir)/pkgconfig