[NFC][libclc] Rename clc_cbrt.inc to clc_cbrt.h (#166330)

__clc_cbrt functions are declared in clc_cbrt.inc. Rename to .h for
consistency with other headers.

GitOrigin-RevId: 8648beff758db89e2eb816bd01d9b3c37e6aa3f9
diff --git a/clc/include/clc/math/clc_cbrt.inc b/clc/include/clc/math/clc_cbrt.h
similarity index 100%
rename from clc/include/clc/math/clc_cbrt.inc
rename to clc/include/clc/math/clc_cbrt.h
diff --git a/clc/lib/generic/math/clc_cbrt.cl b/clc/lib/generic/math/clc_cbrt.cl
index 105f632..935b7b7 100644
--- a/clc/lib/generic/math/clc_cbrt.cl
+++ b/clc/lib/generic/math/clc_cbrt.cl
@@ -8,6 +8,7 @@
 
 #include <clc/clc_convert.h>
 #include <clc/internal/clc.h>
+#include <clc/math/clc_cbrt.h>
 #include <clc/math/clc_copysign.h>
 #include <clc/math/clc_fabs.h>
 #include <clc/math/clc_fma.h>
diff --git a/opencl/lib/generic/math/cbrt.cl b/opencl/lib/generic/math/cbrt.cl
index 0d67015..7de6143 100644
--- a/opencl/lib/generic/math/cbrt.cl
+++ b/opencl/lib/generic/math/cbrt.cl
@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include <clc/math/clc_cbrt.inc>
+#include <clc/math/clc_cbrt.h>
 #include <clc/opencl/math/cbrt.h>
 
 #define __CLC_FUNCTION cbrt