[libc] Fix builds for libc-integration-tests and libc-loader-tests

[cratonica]

Summary

These were failing due to unresolved references to errno

[cratonica]

Missed the linker change to aarch64

[sivachandra]

Seems like this is the wrong place to add these deps. Can you share what you are trying to run and what error you are seeing? FWIW, the integrations tests for x86_64 and aarch64 are run on the public CI builders and they have not caught any problem so far. For example https://lab.llvm.org/buildbot/#/builders/163/builds/18187 and https://lab.llvm.org/buildbot/#/builders/223/builds/945. Neither am I seeing any problems with a clean build.

[cratonica]

Yes, you are right -- the error I was seeing was a result of not running ninja llvmlibc prior to ninja libc-integration-tests on a clean build.

I will drop this.

libc/loader/linux/aarch64/CMakeLists.txt

 add_loader_object(
   crt1
   SRC
     start.cpp
   DEPENDS
     libc.config.linux.app_h
+    libc.include.errno
     libc.include.sys_syscall
     libc.src.__support.OSUtil.osutil
   COMPILE_OPTIONS
     -fno-omit-frame-pointer
     -ffreestanding # To avoid compiler warnings about calling the main function.
 )

libc/loader/linux/x86_64/CMakeLists.txt

 add_loader_object(
   crt1
   SRC
     start.cpp
   DEPENDS
     libc.config.linux.app_h
+    libc.include.errno
     libc.include.sys_mman
     libc.include.sys_syscall
     libc.src.__support.OSUtil.osutil
+    libc.src.errno.errno
     libc.src.string.memory_utils.memcpy_implementation
   COMPILE_OPTIONS
     -fno-omit-frame-pointer
     -ffreestanding # To avoid compiler warnings about calling the main function.
 )