Fix misspelling of faceforward() intrinsic in SPIR-V.

Change-Id: I0e289a136678fe863445f739f162a718c341977f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/343104
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/src/sksl/SkSLSPIRVCodeGenerator.cpp b/src/sksl/SkSLSPIRVCodeGenerator.cpp
index 29e9cd6..c63d84d 100644
--- a/src/sksl/SkSLSPIRVCodeGenerator.cpp
+++ b/src/sksl/SkSLSPIRVCodeGenerator.cpp
@@ -98,7 +98,7 @@
     fIntrinsicMap[String("distance")]    = ALL_GLSL(Distance);
     fIntrinsicMap[String("cross")]       = ALL_GLSL(Cross);
     fIntrinsicMap[String("normalize")]   = ALL_GLSL(Normalize);
-    fIntrinsicMap[String("faceForward")] = ALL_GLSL(FaceForward);
+    fIntrinsicMap[String("faceforward")] = ALL_GLSL(FaceForward);
     fIntrinsicMap[String("reflect")]     = ALL_GLSL(Reflect);
     fIntrinsicMap[String("refract")]     = ALL_GLSL(Refract);
     fIntrinsicMap[String("findLSB")]     = ALL_GLSL(FindILsb);