MdeModulePkg: remove garbage pixels in LaffStd glyphs

[jengelh]

[jengelh]

Before-and-after:

self-extract fragement:

int main()
{
	mkdir("uefi", 0777);
	for (const EFI_NARROW_GLYPH *g = gUsStdNarrowGlyphData; g->UnicodeWeight != 0; ++g) {
		char buf[32];
		sprintf(buf, "uefi/%04x.txt", g->UnicodeWeight);
		FILE *fp = fopen(buf, "w");
		fprintf(fp, "PCLT\n8 %zu\n", sizeof(g->GlyphCol1));
		for (int y = 0; y < (int)sizeof(g->GlyphCol1); ++y) {
			for (int x = 7; x >= 0; --x)
				fprintf(fp, g->GlyphCol1[y] & (1 << x) ? "##" : "..");
			fprintf(fp, "\n");
		}
		fclose(fp);
	}
	return 0;
}

[jengelh]

done in #3938