package_ipk.bbclass: Fix SRC_URI whitespace handling
The SRC_URI may contain whitespace, but be otherwise empty. This can happen
in the case:
MYSRC = ""
MYSRC_arm = "file://myarm.patch"
SRC_URI += "${MYSRC}"
Unless we strip blank spaces, to determine if it is empty, we can end up
generating a "Source: " line which in invalid. This leads to the error:
invalid Source: field is speified in the generated CONTROL file
(From OE-Core rev:
16cedc3bce6fc37543e9ef053cd7c589e523ca1c)
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>