Change default target to avoid installation.

Fixes #20

Signed-off-by: Keith Rothman <537074+litghost@users.noreply.github.com>

Makefile

diff --git a/Makefile b/Makefile
index 06741b4..aff09e8 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@
 PLUGINS_CLEAN := $(foreach plugin,$(PLUGIN_LIST),clean_$(plugin))
 PLUGINS_TEST := $(foreach plugin,$(PLUGIN_LIST),test_$(plugin))
 
-all: install
+all: plugins
 
 define install_plugin =
 $(1).so: