libmakepkg: allow correctly sourcing when $LIBRARY is not set

We usually set this up to default to the build time configured install
location, but a couple of files crept in without this.
Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

scripts/libmakepkg/buildenv.sh.in

@@ -22,6 +22,8 @@
 [[ -n "$LIBMAKEPKG_BUILDENV_SH" ]] && return
 LIBMAKEPKG_BUILDENV_SH=1
 
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
 declare -a buildenv_functions build_options
 
 for lib in "$LIBRARY/buildenv/"*.sh; do

scripts/libmakepkg/executable.sh.in

@@ -21,6 +21,8 @@
 [[ -n "$LIBMAKEPKG_EXECUTABLE_SH" ]] && return
 LIBMAKEPKG_EXECUTABLE_SH=1
 
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
 declare -a executable_functions
 
 for lib in "$LIBRARY/executable/"*.sh; do

scripts/libmakepkg/util/pkgbuild.sh.in

@@ -21,6 +21,8 @@
 [[ -n "$LIBMAKEPKG_UTIL_PKGBUILD_SH" ]] && return
 LIBMAKEPKG_UTIL_PKGBUILD_SH=1
 
+LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
+
 source "$LIBRARY/util/schema.sh"