Fix misspellings in sysdeps/unix -- BZ 25337

Applying this commit results in bit-identical rebuild of
libc.so.6 math/libm.so.6 elf/ld-linux-x86-64.so.2 mathvec/libmvec.so.1

Reviewed-by: Florian Weimer <fweimer@redhat.com>

sysdeps/unix/sysv/linux/test-errno-linux.c

@@ -70,7 +70,7 @@
    Some tests assume "/bin/sh" names a file that exists and is not a
    directory.  */
 
-/* Evalutes to the arguments in a list initializer which can be used
+/* Evaluates to the arguments in a list initializer which can be used
    as a single macro argument.  */
 #define LIST(...) { __VA_ARGS__ }