libem.bash: prefix EM_ changed to MODULE_ for all variables related to the build system, the prefix EM_ is reserved for the environment modules itself

scripts/Modules.build

@@ -5,8 +5,8 @@ source "$(dirname $0)/../lib/libem.bash"
 
 
 function em.configure() {
-	CPPFLAGS="-DUSE_INTERP_ERRORLINE" "${EM_SRCDIR}"/configure \
-		--prefix="${EM_BINDIR}/${EM_FAMILY}" \
+	CPPFLAGS="-DUSE_INTERP_ERRORLINE" "${MODULE_SRCDIR}"/configure \
+		--prefix="${EM_BINDIR}/${MODULE_FAMILY}" \
 		--with-module-path="${MODULEPATH_ROOT}" \
 		|| exit 1
 }