[ARM64EC]Extra pair of quotes added to EC symbol libcall name causes linker errors

[SquallATF]

After commit 4bdcf5b, the EC symbol in libcall names related to have an extra pair of quotation marks ("), which results in undefined symbol errors during linking.
before this commit EC symble name like this

llvm-nm test.o | grep memset
         U #memset

after this commit EC symbol name like this

llvm-nm test.o | grep memset
         U #"memset"

[llvmbot]

@llvm/issue-subscribers-libc

Author: None (SquallATF)

After commit 4bdcf5b, the EC symbol names in libc related to have an extra pair of quotation marks ("), which results in undefined symbol errors during linking. befault this commit EC symble name like this ``` llvm-nm test.o | grep memset U #memset ``` after this commit EC symbol name like this ``` llvm-nm test.o | grep memset U #"memset" ```

[arsenm]

#87542 and whatever commits added the original overrides did not add any tests. This is going to continue breaking without tests. @dpaoliello can you address the original request to add the tests, there really need to be exhaustive tests that cover every ABI function

[dpaoliello]

FYI @efriedma-quic

I'll put it on my todo list, not sure when I'll have time to get to it though...

[llvmbot]

@llvm/issue-subscribers-backend-aarch64

Author: None (SquallATF)

After commit 4bdcf5b, the EC symbol in libcall names related to have an extra pair of quotation marks ("), which results in undefined symbol errors during linking. before this commit EC symble name like this ``` llvm-nm test.o | grep memset U #memset ``` after this commit EC symbol name like this ``` llvm-nm test.o | grep memset U #"memset" ```