[libc] Disable uint test on NVPTX GPUs

This test started failing on Nvidia, we need to disable it to keep the
bot green until we can investigate the root cause.

Differential Revision: https://reviews.llvm.org/D152481

Author: jhuber6

Diff for: libc/test/src/__support/CMakeLists.txt

@@ -72,16 +72,19 @@ if(NOT LIBC_TARGET_ARCHITECTURE_IS_GPU)
   )
 endif()
 
-add_libc_test(
-  uint_test
-  SUITE
-    libc-support-tests
-  SRCS
-    uint_test.cpp
-  DEPENDS
-    libc.src.__support.uint
-    libc.src.__support.CPP.optional
-)
+# This test fails with an illegal memory access on NVPTX.
+if(NOT LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX)
+  add_libc_test(
+    uint_test
+    SUITE
+      libc-support-tests
+    SRCS
+      uint_test.cpp
+    DEPENDS
+      libc.src.__support.uint
+      libc.src.__support.CPP.optional
+  )
+endif()
 
 add_libc_test(
   fixedvector_test