scripts: Update validation_stats.py for new LaTeX

The 1.1.90 header introduced the use of "\textrm" in `validusage.json`,
requiring changes to `vk_validation_stats.py`

Change-Id: I623b4d4765457e84d71636215405c4d611663098
diff --git a/scripts/vk_validation_stats.py b/scripts/vk_validation_stats.py
index a4619bc..f368824 100755
--- a/scripts/vk_validation_stats.py
+++ b/scripts/vk_validation_stats.py
@@ -179,6 +179,7 @@
         self.regex_dict[re.compile('<.*?>|&(amp;)+lt;|&(amp;)+gt;')] = ""
         self.regex_dict[re.compile(r'\\\(codeSize \\over 4\\\)')] = "(codeSize/4)"
         self.regex_dict[re.compile(r'\\\(\\lceil\{\\mathit\{rasterizationSamples} \\over 32}\\rceil\\\)')] = "(rasterizationSamples/32)"
+        self.regex_dict[re.compile(r'\\\(\\textrm\{codeSize} \\over 4\\\)')] = "(codeSize/4)"
         # Some fancy punctuation chars that break the Android build...
         self.regex_dict[re.compile('&#8594;')] = "->"       # Arrow char
         self.regex_dict[re.compile('&#8217;')] = "'"        # Left-slanting apostrophe to apostrophe