debian package: handle grass RC abis

Author: jef-n

debian/rules

@@ -52,7 +52,7 @@ QGIS_PATCH=$(shell sed -ne 's/SET(CPACK_PACKAGE_VERSION_PATCH "\([0-9]*\)")/\1/p
 QGIS_ABI=$(QGIS_MAJOR).$(QGIS_MINOR).$(QGIS_PATCH)
 GRASS=grass$(subst .,,$(shell pkg-config --modversion grass|cut -d. -f1,2))
 GRASSVER=$(subst .,,$(shell pkg-config --modversion grass|cut -d. -f1))
-GRASSABI=$(subst .,,$(shell pkg-config --modversion grass))
+GRASSABI=$(subst .,,$(shell pkg-config --modversion grass|cut -d. -f1,2,3|sed -e 's/RC/-/'))
 
 WITH_GLOBE=$(shell dpkg --compare-versions "$$(dpkg-query -W --showformat='$${Version}' libosgearth-dev)" ge 2.7 && dpkg --compare-versions "$$(dpkg-query -W --showformat='$${Version}' libosgearth-dev)" lt 2.8 && echo 1)