Fix update instructions:

- Fix paths in SA-16:03 for 'make sysent'.
- SA-16:04 doesn't need 'make sysent'.

Noticed by:	Robert Ames <robertames hotmail.com>

share/security/advisories/FreeBSD-SA-16:03.linux.asc

@@ -83,9 +83,9 @@ b) Apply the patch.
 
 # cd /usr/src
 # patch < /path/to/patch
-# cd /usr/src/amd64/linux32
+# cd /usr/src/sys/amd64/linux32
 # make sysent
-# cd /usr/src/i386/linux
+# cd /usr/src/sys/i386/linux
 # make sysent
 
 c) Recompile your kernel and modules as described in
@@ -117,17 +117,17 @@ The latest revision of this advisory is available at
 <URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-16:03.linux.asc>
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share/security/advisories/FreeBSD-SA-16:04.linux.asc

@@ -87,10 +87,6 @@ b) Apply the patch.  Execute the following commands as root:
 
 # cd /usr/src
 # patch < /path/to/patch
-# cd /usr/src/amd64/linux32
-# make sysent
-# cd /usr/src/i386/linux
-# make sysent
 
 c) Recompile your kernel as described in
 <URL:https://www.FreeBSD.org/handbook/kernelconfig.html>.
@@ -129,17 +125,17 @@ The latest revision of this advisory is available at
 <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-16:04.linux.asc>
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