iir1: Initial add 1.9.3

It will become a dependency for dosbox-staging

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>

recipes-support/iir/iir1.bb

@@ -0,0 +1,10 @@
+SUMMARY = "DSP IIR realtime filter library written in C++"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://COPYING;md5=3e4bda4204237f84ed771428f1b0a656"
+
+SRC_URI = "git://github.com/berndporr/iir1.git;protocol=https;branch=master"
+SRCREV = "f5eaccc87c437d7ca3d050bdfe0783523dbb9d0e"
+PV = "1.9.3"
+S = "${WORKDIR}/git"
+
+inherit cmake pkgconfig