[compiler-rt] Allow trampoline allocation further and 1 gig.

[etienneb]

Summary

The trampoline allocation limits the memory scanning to 1 gig.
There is an unittest that is allocating a large object which make
it impossible to the trampoline allocator to find a free spot.

see shadow_mapping_failures:

char bigchunk[1 << 30];

This patch is not fixing the unittest but it's fixing it's infinite
loop behavior.

[rnk]

lgtm

lib/interception/interception_win.cc

 }
 
 struct TrampolineMemoryRegion {
   uptr content;
   uptr allocated_size;
   uptr max_size;
 };
 
-static const uptr kTrampolineScanLimitRange = 1 << 30;  // 1 gig
+static const uptr kTrampolineScanLimitRange = 1 << 31;  // 2 gig
 static const int kMaxTrampolineRegion = 1024;
 static TrampolineMemoryRegion TrampolineRegions[kMaxTrampolineRegion];
 
 static void *AllocateTrampolineRegion(uptr image_address, size_t granularity) {
 #if SANITIZER_WINDOWS64
   uptr address = image_address;
   uptr scanned = 0;
   while (scanned < kTrampolineScanLimitRange) {