Fix build errors on QuRT (Hexagon) (#1938)

Author: dsharlet

src/cycleclock.h

@@ -219,7 +219,7 @@ inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
 #elif defined(__hexagon__)
   uint64_t pcycle;
   asm volatile("%0 = C15:14" : "=r"(pcycle));
-  return static_cast<double>(pcycle);
+  return static_cast<int64_t>(pcycle);
 #elif defined(__alpha__)
   // Alpha has a cycle counter, the PCC register, but it is an unsigned 32-bit
   // integer and thus wraps every ~4s, making using it for tick counts

src/sysinfo.cc

@@ -509,7 +509,7 @@ int GetNumCPUsImpl() {
   if (qurt_sysenv_get_max_hw_threads(&hardware_threads) != QURT_EOK) {
     hardware_threads.max_hthreads = 1;
   }
-  return hardware_threads.max_hthreads;
+  return static_cast<int>(hardware_threads.max_hthreads);
 #elif defined(BENCHMARK_HAS_SYSCTL)
   // *BSD, macOS
   int num_cpu = -1;