[source] build: copy contents of 'src' folder to build dirs (if present)

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/7c8c3226dc8ecd2b77d1d1e8215e0fbb52819cd7

commit 7c8c3226dc8ecd2b77d1d1e8215e0fbb52819cd7
Author: Alexandru Ardelean <ardeleanalex at gmail.com>
AuthorDate: Wed Oct 5 17:28:46 2016 +0300

    build: copy contents of 'src' folder to build dirs (if present)
    
    The normal Prepare step for a build is unpack, apply patches.
    But for certain packages, patches contain whole files, which
    would be nice to have separately and copied over as a last step
    in the Prepare phase.
    
    We need it for some other packages + patches, but I think
    the 'hostapd' package can be used as a test for this.
    
    As a quick note:
    the reason the condition is being evaluated as
    `[ ! -d ./src/ ] || $(CP) ./src/* $(HOST_BUILD_DIR)`
    and not with
    `[ -d ./src/ ] && $(CP) ./src/* $(HOST_BUILD_DIR)`
    is that the latter would translate in a build failure if the `src`
    folder is not present (the exit code would be 1).
    The first one, succeeds for both cases (if `src` present or not).
    
    Signed-off-by: Alexandru Ardelean <ardeleanalex at gmail.com>
---
 include/host-build.mk       | 1 +
 include/package-defaults.mk | 1 +
 2 files changed, 2 insertions(+)

diff --git a/include/host-build.mk b/include/host-build.mk
index 72b3259..56e0e4e 100644
--- a/include/host-build.mk
+++ b/include/host-build.mk
@@ -43,6 +43,7 @@ Host/Patch:=$(Host/Patch/Default)
 ifneq ($(strip $(HOST_UNPACK)),)
   define Host/Prepare/Default
 	$(HOST_UNPACK)
+	[ ! -d ./src/ ] || $(CP) ./src/* $(HOST_BUILD_DIR)
 	$(Host/Patch)
   endef
 endif
diff --git a/include/package-defaults.mk b/include/package-defaults.mk
index 4eb5409..487811c 100644
--- a/include/package-defaults.mk
+++ b/include/package-defaults.mk
@@ -62,6 +62,7 @@ Build/Patch:=$(Build/Patch/Default)
 ifneq ($(strip $(PKG_UNPACK)),)
   define Build/Prepare/Default
 	$(PKG_UNPACK)
+	[ ! -d ./src/ ] || $(CP) ./src/* $(PKG_BUILD_DIR)
 	$(Build/Patch)
   endef
 endif