build: macos: Don't strip trailing a newline and white space
build: macos: Don't strip trailing a newline and white space

This is because removing trailing newline should cause corrupted
certificates on concatenating.
OpenSSL's loading PEM format of certificates more strict than mbedTLS's
one.

Signed-off-by: Hiroshi Hatake <a476a6e5b5893650242fbf0b2961500a9bd9032e@calyptia.com>

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