[source] kernel: fix linux 4.9 host tools portability issues

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/e0e5f8ca2f6feaf9dc30d0c29619f2545800e790

commit e0e5f8ca2f6feaf9dc30d0c29619f2545800e790
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Sat Feb 11 19:02:50 2017 +0100

    kernel: fix linux 4.9 host tools portability issues
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 .../patches-4.9/211-host_tools_portability.patch   | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/target/linux/generic/patches-4.9/211-host_tools_portability.patch b/target/linux/generic/patches-4.9/211-host_tools_portability.patch
new file mode 100644
index 0000000..73fd50d
--- /dev/null
+++ b/target/linux/generic/patches-4.9/211-host_tools_portability.patch
@@ -0,0 +1,28 @@
+--- a/tools/perf/pmu-events/jevents.c
++++ b/tools/perf/pmu-events/jevents.c
+@@ -35,6 +35,7 @@
+ #include <stdlib.h>
+ #include <errno.h>
+ #include <string.h>
++#include <strings.h>
+ #include <ctype.h>
+ #include <unistd.h>
+ #include <stdarg.h>
+--- a/tools/perf/pmu-events/json.c
++++ b/tools/perf/pmu-events/json.c
+@@ -38,7 +38,6 @@
+ #include <unistd.h>
+ #include "jsmn.h"
+ #include "json.h"
+-#include <linux/kernel.h>
+ 
+ 
+ static char *mapfile(const char *fn, size_t *size)
+--- a/tools/build/Build.include
++++ b/tools/build/Build.include
+@@ -95,4 +95,4 @@ cxx_flags = -Wp,-MD,$(depfile),-MT,$@ $(
+ ###
+ ## HOSTCC C flags
+ 
+-host_c_flags = -Wp,-MD,$(depfile),-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))
++host_c_flags = -MD -MF $(depfile) -MT $@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))