fix: require gmake

IPFS doesn't build correctly under non-GNU make implementations.

fix: require gmake
IPFS doesn't build correctly under non-GNU make implementations.
1de768fb · Steven Allen · cd3fcb9b · 1de768fb · 1de768fb · 1de768fb
--- a/Makefile
+++ b/Makefile
--- a/test/3nodetest/Makefile
+++ b/test/3nodetest/Makefile
--- a/test/dependencies/Makefile
+++ b/test/dependencies/Makefile
--- a/test/integration/Makefile
+++ b/test/integration/Makefile
--- a/test/sharness/Makefile
+++ b/test/sharness/Makefile