libnuma numa_parse_cpustring and similar should take a const char* parameter

Issue

• libnuma numa_parse_cpustring and similar should take a const char* parameter
• The declaration of the functions like numa_parse_cpustring are taking a char*:

struct bitmask *numa_parse_cpustring(char *);
struct bitmask *numa_parse_nodestring(char *);

• However it should be declared a const char * to prevent warnings like:

testconst.c:10:45: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings]

• Looking at the source code, the string is handled like it was a const and it doesn't actually modify the string that it is parsing.