dev-libs/libev: version bump 4.25

Closes: https://bugs.gentoo.org/687020

Package-Manager: Portage-2.3.67, Repoman-2.3.13
Signed-off-by: Yixun Lan <dlan@gentoo.org>

dev-libs/libev/files/libev-4.25-pc.patch

@@ -0,0 +1,49 @@
+diff --git a/Makefile.am b/Makefile.am
+index 059305b..76d9852 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -16,5 +16,8 @@ lib_LTLIBRARIES = libev.la
+ libev_la_SOURCES = ev.c event.c
+ libev_la_LDFLAGS = -version-info $(VERSION_INFO)
+ 
++pkgconfigdir = $(libdir)/pkgconfig
++pkgconfig_DATA = libev.pc
++
+ ev.3: ev.pod
+ 	pod2man -n LIBEV -r "libev-$(VERSION)" -c "libev - high performance full featured event loop" -s3 <$< >$@
+diff --git a/configure.ac b/configure.ac
+index b004dda..6ba3f5c 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -4,6 +4,7 @@ AC_INIT([libev], [4.25])
+ orig_CFLAGS="$CFLAGS"
+ 
+ AC_CONFIG_SRCDIR([ev_epoll.c])
++AC_CONFIG_MACRO_DIR([m4])
+ AM_INIT_AUTOMAKE
+ 
+ AC_CONFIG_HEADERS([config.h])
+@@ -23,5 +24,5 @@ AC_PROG_LIBTOOL
+ 
+ m4_include([libev.m4])
+ 
+-AC_CONFIG_FILES([Makefile])
++AC_CONFIG_FILES([Makefile libev.pc])
+ AC_OUTPUT
+diff --git a/libev.pc.in b/libev.pc.in
+new file mode 100644
+index 0000000..8bc8681
+--- /dev/null
++++ b/libev.pc.in
+@@ -0,0 +1,11 @@
++prefix=@prefix@
++exec_prefix=@prefix@
++libdir=@libdir@
++includedir=@includedir@
++
++Name: libev
++Description: A high-performance event loop/event model with lots of features
++Version: @VERSION@
++Libs: -L${libdir} -lev
++Libs.private:
++Cflags: -I${includedir}