libinih: Update to version 61

libinih: Update to version 61

- Update from version 58 to 61
- Update of rootfile not required
- Changelog
    61
	    add option to disable the test suite by @sage-etcher in #195
	    add ini_parse_string_length() that avoids internal strlen(), and ease… by
		@lihuiba in #196
	    Fix bug where name only options are not processed after an error has
		occurred by @msquire in #197
	    Optimise ini_rstrip() by @msquire in #198
    60
	    test long lines by @isidroas in #190
	    Require C++ only for the host machine; bump project version to 59 by
		@bgilbert in #191
	    meson: fix tests under Windows by @neheb in #192
    59
	    INIReader: change variable visibility from private to protected by
		@meiyasan in #165
	    Add meson test driver by @matoro in #170
	    Swap rstrip() and lskip() to reduce execution time of strlen() by
		@isidroas in #177
	    Add preprocessor exclusions when INI_ALLOW_MULTILINE=0 by @isidroas in #178
	    tests: define only once the compiler and flag by @isidroas in #179
	    Test that long sections are truncated by @isidroas in #180
	    Add INIReader Sections and Keys methods by @Ishan09811 in #186
	    If a line is longer than INI_MAX_LINE, consume input up to next newline by
		@benhoyt in #188

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>