[LLVM] Fix getpagesize in ORC runner for tpde-lli

getpagesize(2) is not portable. Some systems use sysconf(3) instead.
Let's use llvm::sys::Process::getPageSize()

Author: weliveindetail

tpde-llvm/tools/tpde-lli.cpp

@@ -130,7 +130,7 @@ int main(int argc, char *argv[]) {
   auto obj_membuf = llvm::MemoryBuffer::getMemBuffer(buf_strref, "", false);
   assert(obj_membuf->getBufferSize());
 
-  size_t page_size = getpagesize();
+  size_t page_size = exit_on_err(llvm::sys::Process::getPageSize());
   llvm::orc::ExecutionSession es(
       exit_on_err(llvm::orc::SelfExecutorProcessControl::Create()));
   llvm::orc::MapperJITLinkMemoryManager memory_manager(