glcpp: Reject #version and #line not followed by whitespace

Fixes part of es3conform's preprocess16_frag test.
Reviewed-by: Carl Worth <cworth@cworth.org>

src/glsl/glcpp/tests/108-no-space-after-hash-version.c

@@ -0,0 +1 @@
+#version110

src/glsl/glcpp/tests/108-no-space-after-hash-version.c.expected

@@ -0,0 +1,2 @@
+0:1(3): preprocessor error: Invalid tokens after #
+

src/glsl/glcpp/tests/109-no-space-after-hash-line.c

@@ -0,0 +1 @@
+#line2

src/glsl/glcpp/tests/109-no-space-after-hash-line.c.expected

@@ -0,0 +1,2 @@
+0:1(3): preprocessor error: Invalid tokens after #
+