gcc-cross-canadian: Correct the regexp to delete versioned gcc binary

After gcc 10 this expression needed to be adjusted, its better to use a
bitbake variable which we do have readily available

(From OE-Core rev: ee2beaff701d02736c8244ebc76f6d6ca96a04f4)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/gcc/gcc-cross-canadian.inc

@@ -106,7 +106,7 @@ do_install () {
 	rm -f ${D}${bindir}/*c++
 
 	# We don't care about the gcc-<version> copies
-	rm -f ${D}${bindir}/*gcc-?.?*
+	rm -f ${D}${bindir}/*gcc-${BINV}*
 
 	# Cleanup empty directories which are not shipped
 	# we use rmdir instead of 'rm -f' to ensure the non empty directories are not deleted