[gnome-code-assistance] build: Update LLVM and Vala versions

[Ting-Wei Lan <lantw src gnome org>]

commit 7f81c19958bf9bd2f98f65c4280d9275aa0d81fd
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Sun Apr 22 19:55:42 2018 +0800

    build: Update LLVM and Vala versions
    
    https://bugzilla.gnome.org/show_bug.cgi?id=795457

 configure.ac |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e53899c..12735b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -97,6 +97,7 @@ AC_ARG_ENABLE([c],
 
 if test "x$enable_c" = "xauto"; then
        AC_PATH_PROGS([LLVM_CONFIG], [ \
+               llvm-config-6.0 llvm-config60 \
                llvm-config-5.0 llvm-config50 \
                llvm-config-4.0 llvm-config40 \
                llvm-config-3.9 llvm-config39 \
@@ -105,7 +106,7 @@ if test "x$enable_c" = "xauto"; then
                llvm-config-3.6 llvm-config36 \
                llvm-config-3.5 llvm-config35 \
                llvm-config \
-               llvm-config-6.0 llvm-config-devel])
+               llvm-config-7 llvm-config-devel])
 
        AC_MSG_CHECKING([c backend])
 
@@ -118,6 +119,7 @@ if test "x$enable_c" = "xauto"; then
        fi
 elif test "x$enable_c" != "xno"; then
        AC_PATH_PROGS([LLVM_CONFIG], [ \
+               llvm-config-6.0 llvm-config60 \
                llvm-config-5.0 llvm-config50 \
                llvm-config-4.0 llvm-config40 \
                llvm-config-3.9 llvm-config39 \
@@ -126,7 +128,7 @@ elif test "x$enable_c" != "xno"; then
                llvm-config-3.6 llvm-config36 \
                llvm-config-3.5 llvm-config35 \
                llvm-config \
-               llvm-config-6.0 llvm-config-devel])
+               llvm-config-7 llvm-config-devel])
 
        AC_MSG_CHECKING([c backend])
 
@@ -460,7 +462,7 @@ AC_ARG_ENABLE([vala],
               [enable_vala=$enableval],
               [enable_vala=auto])
 
-BACKEND_VALA_LIBVALA_VERSIONS="libvala-0.40 libvala-0.38 libvala-0.36 libvala-0.34 libvala-0.32 libvala-0.30 
libvala-0.28 libvala-0.26 libvala-0.24 libvala-0.22 libvala-0.20"
+BACKEND_VALA_LIBVALA_VERSIONS="libvala-0.42 libvala-0.40 libvala-0.38 libvala-0.36 libvala-0.34 libvala-0.32 
libvala-0.30 libvala-0.28 libvala-0.26 libvala-0.24 libvala-0.22 libvala-0.20"
 BACKEND_VALA_MODULES="gobject-2.0 >= 2.36 glib-2.0 >= 2.36 gio-2.0 >= 2.36 gee-0.8 gio-unix-2.0 >= 2.36"
 
 BACKEND_VALA_LIBVALA=