Add gumbo.spec.

SPECS/gumbo.spec

+Name:		gumbo-parser
+Version:	0.10.1
+Release:	0
+Summary:	An HTML5 parsing library in pure C99
+Group:		Development/Libraries/HTML
+License:	Apache-2.0
+URL:		https://github.com/google/gumbo-parser
+Vendor:		Google.com
+Source:		%{url}/archive/v%{version}.tar.gz#/gumbo-parser-%{version}.tar.gz
+Prefix:		%{_prefix}
+Packager:	hugo <hugo@lysator.liu.se>
+BuildRoot:	%{tmppath}/%{name}-root
+
+%description
+Gumbo is an implementation of the HTML5 parsing algorithm implemented
+as a pure C99 library with no outside dependencies. It's designed to
+serve as a building block for other tools and libraries such as
+linters, validators, templating languages, and refactoring and
+analysis tools.
+
+%prep
+%setup
+
+%build
+./autogen.sh
+CFLAGS="$RPM_OPT_FLAGS" ./configure --prefix=%{_prefix} --mandir=%{_mandir} --sysconfdir=/etc
+
+make -j
+
+%install
+
+# [ "$RPM_BUILD_ROOT" != "/" ] && rm -rf $RPM_BUILD_ROOT
+
+make install DESTDIR=$RPM_BUILD_ROOT
+
+%clean
+[ "$RPM_BUILD_ROOT" != "/" ] && rm -rf $RPM_BUILD_ROOT
+
+%files
+%{_prefix}/include/gumbo.h
+%{_prefix}/include/tag_enum.h
+%{_prefix}/lib/libgumbo*
+%{_prefix}/lib/pkgconfig/gumbo.pc