[NFC][Sanitizer] Fix incorrect desc of [beg, end] to [beg, end)

Correct the interval desc of ReleaseMemoryPagesToOS from [beg, end] to
[beg, end), as it actually does.

The previous incorrect description of [beg, end] might cause an
incorrect invoke as follows: `ReleaseMemoryPagesToOS(0, kPageSize - 1);`

Author: Camsyn

compiler-rt/lib/sanitizer_common/sanitizer_common.h

@@ -166,7 +166,7 @@ uptr FindAvailableMemoryRange(uptr size, uptr alignment, uptr left_padding,
 
 // Used to check if we can map shadow memory to a fixed location.
 bool MemoryRangeIsAvailable(uptr range_start, uptr range_end);
-// Releases memory pages entirely within the [beg, end] address range. Noop if
+// Releases memory pages entirely within the [beg, end) address range. Noop if
 // the provided range does not contain at least one entire page.
 void ReleaseMemoryPagesToOS(uptr beg, uptr end);
 void IncreaseTotalMmap(uptr size);

compiler-rt/lib/sanitizer_common/sanitizer_linux.h

@@ -130,7 +130,7 @@ bool LibraryNameIs(const char *full_name, const char *base_name);
 // Call cb for each region mapped by map.
 void ForEachMappedRegion(link_map *map, void (*cb)(const void *, uptr));
 
-// Releases memory pages entirely within the [beg, end] address range.
+// Releases memory pages entirely within the [beg, end) address range.
 // The pages no longer count toward RSS; reads are guaranteed to return 0.
 // Requires (but does not verify!) that pages are MAP_PRIVATE.
 inline void ReleaseMemoryPagesToOSAndZeroFill(uptr beg, uptr end) {