Bug 1448027 - make constructors in the profiler explicit; r=mstange

Attempting to stand up the static analysis for Android builds revealed
that we weren't being explicit enough.

tools/profiler/core/EHABIStackWalk.cpp

@@ -82,7 +82,7 @@ public:
   bool unwind(const EHEntry *aEntry, const void *stackBase);
   uint32_t &operator[](int i) { return mRegs[i]; }
   const uint32_t &operator[](int i) const { return mRegs[i]; }
-  EHState(const mcontext_t &);
+  explicit EHState(const mcontext_t &);
 };
 
 enum {

tools/profiler/lul/AutoObjectMapper.h

@@ -86,7 +86,7 @@ private:
 
 class MOZ_STACK_CLASS AutoObjectMapperFaultyLib : public AutoObjectMapperPOSIX {
 public:
-  AutoObjectMapperFaultyLib(void(*aLog)(const char*));
+  explicit AutoObjectMapperFaultyLib(void(*aLog)(const char*));
 
   ~AutoObjectMapperFaultyLib();