sysctl: Bring procio functions out of library

The procio functions that were in the library have been
moved into sysctl. sysctl is not linked to libprocps in
newlib and none of the other procps binaries would need
to read/write large data to the procfs.

References:
 be6b048a41

Makefile.am

@@ -210,7 +210,11 @@ pmap_SOURCES = pmap.c lib/fileutils.c
 if !CYGWIN
 pwdx_SOURCES = pwdx.c lib/fileutils.c
 pwdx_LDADD= $(CYGWINFLAGS)
-sysctl_SOURCES = sysctl.c lib/fileutils.c
+sysctl_SOURCES = \
+	sysctl.c \
+	lib/fileutils.c \
+	procio.c \
+	procio.h
 sysctl_LDADD=
 endif
 tload_SOURCES = tload.c lib/strutils.c lib/fileutils.c
@@ -252,8 +256,6 @@ proc_libprocps_la_SOURCES = \
 	proc/numa.h \
 	proc/pids.c \
 	proc/pids.h \
-	proc/procio.c \
-	proc/procio.h \
 	proc/procps.h \
 	proc/pwcache.c \
 	proc/pwcache.h \
@@ -284,7 +286,6 @@ proc_libprocps_la_include_HEADERS = \
 	proc/namespace.h \
 	proc/numa.h \
 	proc/pids.h \
-	proc/procio.h \
 	proc/procps.h \
 	proc/pwcache.h \
 	proc/readproc.h \