[libc] Fix assert.h and ctype.h not being built

The `assert.h` and `ctype.h` headers are never built despite their
entrypoints being present in the generated library. This patch adds a
dependency on these headers so that they will be built properly.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D138142

libc/config/linux/aarch64/headers.txt

@@ -1,5 +1,5 @@
 set(TARGET_PUBLIC_HEADERS
-    libc.include.assert_h
+    libc.include.assert
     libc.include.ctype
     libc.include.errno
     libc.include.fenv

libc/config/linux/x86_64/headers.txt

@@ -1,5 +1,5 @@
 set(TARGET_PUBLIC_HEADERS
-    libc.include.assert_h
+    libc.include.assert
     libc.include.ctype
     libc.include.dirent
     libc.include.errno

libc/include/CMakeLists.txt

@@ -69,7 +69,7 @@ add_gen_header(
 )
 
 add_gen_header(
-  assert_h
+  assert
   DEF_FILE assert.h.def
   GEN_HDR assert.h
   DEPENDS

libc/src/assert/CMakeLists.txt

@@ -6,6 +6,7 @@ add_entrypoint_object(
     __assert_fail.h
     assert.h
   DEPENDS
+    libc.include.assert
     libc.src.__support.OSUtil.osutil
     libc.src.stdlib.abort
 )

libc/src/ctype/CMakeLists.txt

@@ -5,6 +5,7 @@ add_entrypoint_object(
   HDRS
     isalnum.h
   DEPENDS
+    libc.include.ctype
     libc.src.__support.ctype_utils
 )