HADOOP-17399. lz4 sources missing for native Visual Studio project

[GauthamBanasandra]

• The sources for lz4 do not exist for native
  vcxproj for Visual Studio on the Windows
  platform. Hence, removing the corresponding
  source references.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 37s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+1 💚	mvninstall	34m 56s		trunk passed
+1 💚	compile	21m 50s		trunk passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	compile	18m 36s		trunk passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
+1 💚	mvnsite	1m 28s		trunk passed
+1 💚	shadedclient	92m 43s		branch has no errors when building and testing our client artifacts.
+1 💚	javadoc	1m 7s		trunk passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	javadoc	1m 40s		trunk passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 0s		the patch passed
+1 💚	compile	22m 31s		the patch passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	javac	22m 31s		the patch passed
+1 💚	compile	21m 8s		the patch passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
+1 💚	javac	21m 8s		the patch passed
+1 💚	mvnsite	1m 39s		the patch passed
+1 💚	whitespace	0m 0s		The patch has no whitespace issues.
+1 💚	shadedclient	18m 29s		patch has no errors when building and testing our client artifacts.
+1 💚	javadoc	1m 10s		the patch passed with JDK Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04
+1 💚	javadoc	1m 45s		the patch passed with JDK Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
			_ Other Tests _
+1 💚	unit	10m 34s		hadoop-common in the patch passed.
+1 💚	asflicense	0m 59s		The patch does not generate ASF License warnings.
		179m 51s

Subsystem	Report/Notes
Docker	ClientAPI=1.40 ServerAPI=1.40 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2498/1/artifact/out/Dockerfile
GITHUB PR	#2498
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient
uname	Linux 011a18195cf3 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 68442b4
Default Java	Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.9.1+1-Ubuntu-0ubuntu1.18.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2498/1/testReport/
Max. process+thread count	2922 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2498/1/console
versions	git=2.17.1 maven=3.6.0
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[GauthamBanasandra]

This PR only changes the build related code, which can't be tested.

[sunchao]

LTGM - thanks @GauthamBanasandra . cc @viirya

[viirya]

Thanks!