toolchain: Update to newer glslang and LunarGLASS versions

LUNARGLASS_REVISION=1070
GLSLANG_REVISION=30939
diff --git a/update_external_sources.sh b/update_external_sources.sh
index 73ed8ee..efeafe4 100755
--- a/update_external_sources.sh
+++ b/update_external_sources.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 # Update source for glslang and LLVM
 
-LUNARGLASS_REVISION=1061
-GLSLANG_REVISION=30042
+LUNARGLASS_REVISION=1070
+GLSLANG_REVISION=30939
 
 BUILDDIR=$PWD
 BASEDIR=$BUILDDIR/..