[Bazel] Fix libc Bazel build for 29be889

Author: Dmitry Chernenkov

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

@@ -1076,6 +1076,22 @@ libc_support_library(
     ],
 )
 
+libc_support_library(
+    name = "__support_osutil_pid",
+    srcs = ["src/__support/OSUtil/linux/pid.cpp"],
+    hdrs = ["src/__support/OSUtil/pid.h"],
+    target_compatible_with = select({
+        "@platforms//os:linux": [],
+        "//conditions:default": ["@platforms//:incompatible"],
+    }),
+    deps = [
+        ":__support_macros_attributes",
+        ":__support_macros_optimization",
+        ":__support_osutil_syscall",
+        ":types_pid_t",
+    ]
+)
+
 libc_support_library(
     name = "__support_stringutil",
     srcs = glob(["src/__support/StringUtil/tables/**/*.h"]) + [
@@ -3032,8 +3048,11 @@ libc_function(
     hdrs = ["src/unistd/getpid.h"],
     deps = [
         ":__support_common",
+        ":__support_macros_config",
+        ":__support_osutil_pid",
         ":__support_osutil_syscall",
         ":errno",
+        ":types_pid_t",
     ],
 )