Add support for our own DTrace scripts and those from the DTraceToolkit

to the build system.  FreeBSD written scripts are stored in
src/share and the toolkit scripts are brought from the cddl directory
into a working tree via install.

MFC after:	2 weeks

etc/mtree/BSD.usr.dist

@@ -200,6 +200,10 @@
                 ..
             ..
         ..
+        dtrace
+            toolkit
+            ..
+        ..  
         examples
             BSD_daemon
             ..

share/Makefile

@@ -8,6 +8,7 @@
 SUBDIR=	${_colldef} \
 	${_dict} \
 	${_doc} \
+	dtrace \
 	${_examples} \
 	${_i18n} \
 	${_man} \

share/dtrace/Makefile

@@ -0,0 +1,21 @@
+# $FreeBSD$
+#
+# Hand installing our scripts and optionally (based on MK_CDDL) installing
+# the DTraceToolkit.
+#
+
+.include <bsd.own.mk>
+
+SUBDIR= ${_toolkit}
+
+.if ${MK_CDDL} != "no"
+_toolkit=	toolkit
+.endif
+
+SCRIPTS=	nfsclienttime
+
+SCRIPTSDIR= ${SHAREDIR}/dtrace/
+
+NO_OBJ=
+
+.include <bsd.prog.mk>

share/dtrace/README

@@ -0,0 +1,11 @@
+$FreeBSD$
+
+This directory contains scripts for use with the DTrace system.  The
+toolkit/ directory contains the latest vendor import of Brendan
+Gregg's DTRaceToolkit while all the other files and directories
+contain code generated by the FreeBSD Project for use with DTrace on
+FreeBSD.
+
+NOTE: Do not add new scripts to the DTraceToolkit contained in this
+directory. New DTraceToolkit scripts should be send to the maintainer
+of the toolkit and then brought back into FreeBSD via future vendor imports.

share/dtrace/toolkit/Makefile

@@ -0,0 +1,17 @@
+#$FreeBSD$
+#
+# Install scripts from the DTraceToolkit
+#
+DTRACETOOLKIT= ../../../cddl/contrib/dtracetoolkit
+
+SCRIPTS=	${DTRACETOOLKIT}/execsnoop \
+		${DTRACETOOLKIT}/hotuser   \
+		${DTRACETOOLKIT}/hotkernel \
+		${DTRACETOOLKIT}/opensnoop \
+		${DTRACETOOLKIT}/procsystime \
+
+SCRIPTSDIR= ${SHAREDIR}/dtrace/toolkit
+
+NO_OBJ=
+
+.include <bsd.prog.mk>