Try to restore some clang test headers lost in r360291

I'm not sure why 'git llvm revert' removed them.

llvm-svn: 360297

clang/test/Headers/Inputs/include/cmath

@@ -0,0 +1,5 @@
+#pragma once
+
+double sqrt(double);
+double pow(double, double);
+double modf(double, double*);

clang/test/Headers/Inputs/include/complex.h

@@ -0,0 +1,3 @@
+#pragma once
+
+#define complex _Complex

clang/test/Headers/Inputs/include/limits

@@ -0,0 +1,10 @@
+#pragma once
+
+namespace std
+{
+struct __numeric_limits_base
+  {};
+template<typename _Tp>
+  struct numeric_limits : public __numeric_limits_base
+    {};
+}

clang/test/Headers/Inputs/include/math.h

@@ -0,0 +1,5 @@
+#pragma once
+
+double sqrt(double);
+double pow(double, double);
+double modf(double, double*);

clang/test/Headers/Inputs/include/setjmp.h

@@ -0,0 +1,8 @@
+#ifndef SETJMP_H
+#define SETJMP_H
+
+typedef struct {
+  int x[42];
+} jmp_buf;
+
+#endif

clang/test/Headers/Inputs/include/stdint.h

@@ -0,0 +1,19 @@
+#ifndef STDINT_H
+#define STDINT_H
+
+#ifdef __INT32_TYPE__
+typedef unsigned __INT32_TYPE__ uint32_t;
+#endif
+
+#ifdef __INT64_TYPE__
+typedef unsigned __INT64_TYPE__ uint64_t;
+#endif
+
+#ifdef __INTPTR_TYPE__
+typedef __INTPTR_TYPE__ intptr_t;
+typedef unsigned __INTPTR_TYPE__ uintptr_t;
+#else
+#error Every target should have __INTPTR_TYPE__
+#endif
+
+#endif /* STDINT_H */

clang/test/Headers/Inputs/include/stdlib.h

@@ -0,0 +1,2 @@
+#pragma once
+typedef __SIZE_TYPE__ size_t;

clang/test/Headers/Inputs/usr/include/float.h

@@ -0,0 +1,6 @@
+#ifndef SYSFLOAT_H
+#define SYSFLOAT_H
+
+#define FLT_HAS_SUBNORM 1
+
+#endif /* SYSFLOAT_H */

clang/test/Headers/Inputs/usr/include/math.h

@@ -0,0 +1 @@
+// math.h

clang/test/Headers/Inputs/usr/include/tgmath.h

@@ -0,0 +1,4 @@
+#ifndef SYS_TGMATH_H
+#define SYS_TGMATH_H
+
+#endif /* SYS_TGMATH_H */