Explicitly depend on libc_errno.h in RoundToIntegerTest, clean up CMake.

Author: vonosmas

libc/test/src/math/smoke/CMakeLists.txt

@@ -633,7 +633,7 @@ add_fp_unittest(
   HDRS
     SubTest.h
   DEPENDS
-    libc.src.errno.errno
+    libc.hdr.errno_macros
     libc.hdr.fenv_macros
     libc.src.math.dsubl
     libc.src.__support.macros.properties.os
@@ -5043,7 +5043,6 @@ add_fp_unittest(
   SRCS
     pow_test.cpp
   DEPENDS
-    libc.src.errno.errno
     libc.hdr.fenv_macros
     libc.src.math.pow
 )

libc/test/src/math/smoke/RoundToIntegerTest.h

@@ -12,6 +12,7 @@
 #include "src/__support/CPP/algorithm.h"
 #include "src/__support/FPUtil/FEnvImpl.h"
 #include "src/__support/FPUtil/FPBits.h"
+#include "src/__support/libc_errno.h"
 #include "test/UnitTest/FEnvSafeTest.h"
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"