BaseTools/Conf/tools_def: Fix linking using CLANGDWARF_IA32

The clang toolchain might default to fPIE/fPIC, which prevents
lld from linking the objects into a binary.

Specify -fno-pie -fno-pic as done on GCC to fix linking.

Test:
Building the Universal Payload using the command
'python UefiPayloadPkg/UniversalPayloadBuild.py -a IA32' actually
works.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Rebecca Cran <rebecca@bsdio.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=4356