[libc][bazel] Fix bazel build (#86190)

Follow up on #86140

Author: gchatelet

utils/bazel/llvm-project-overlay/libc/BUILD.bazel

@@ -97,6 +97,11 @@ libc_support_library(
  deps = [":llvm_libc_macros_float_macros"],
 )
 
+libc_support_library(
+ name = "llvm_libc_macros_fcntl_macros",
+ hdrs = ["include/llvm-libc-macros/linux/fcntl-macros.h"],
+)
+
 ############################### Support libraries ##############################
 
 libc_support_library(
@@ -3271,6 +3276,7 @@ libc_function(
  ":__support_common",
  ":__support_osutil_syscall",
  ":errno",
+ ":llvm_libc_macros_fcntl_macros",
  ],
 )